Apparatus for extending ventilating conduits

Details Apparatus for extending ventilating conduits Apparatus for extending ventilating conduits

1980-09-02

1982-11-30

Makay, Albert J.

Pipes and tubular conduits

Repairing

29431, 98115VM, 98DIG7, 138120, 193 25C, 285260, 285302, 406196, E21F 104

Patent

active

043610790

ABSTRACT:
Apparatus for continuously extending ventilating conduits in tunnelling or mining environments includes a tubular store to which a funnel guide is releasably connected. A folded flexible ventilating pipe is received on the store and fastening means are provided to connect an end of the ventilating pipe to the end of the ventilating conduit to be extended. In use, the apparatus is advanced and the ventilating pipe is gradually pulled off the store and unfolded by being passed over the funnel guide.

REFERENCES:
patent: 2871508 (1959-02-01), Hill
patent: 3010144 (1961-11-01), Kochjohann
patent: 3464756 (1969-09-01), Burgess, Jr.
patent: 3574361 (1971-04-01), Contreras et al.
patent: 3822412 (1974-07-01), Carlin et al.
patent: 4020753 (1977-05-01), Efstratis
patent: 4202075 (1980-05-01), Michel et al.

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